Home / 18,457.47-25,481.66-12,180.78

Finding the Fourth Proportional to 18,457.47, 25,481.66 and 12,180.78

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Solution

The fourth proportional to 18,457.47, 25,481.66 and 12,180.78 is: 16,816.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,457.47 : 25,481.66 = 12,180.78 : x
  2. Step 2: Convert to fraction form
    18,457.47/25,481.66 = 12,180.78/x
  3. Step 3: Cross multiply
    18,457.47x = 25,481.66 × 12,180.78
  4. Step 4: Simplify right side
    18,457.47x = 310,386,433.59
  5. Step 5: Solve for x
    x = 310,386,433.59/18,457.47
  6. Step 6: Final answer
    x = 16,816.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.